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Constraints on new scalar and vector mediators from LHC dijet searches
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm Univ, Dept Phys, Oskar Klein Ctr, AlbaNova, SE-10691 Stockholm, Sweden..ORCID iD: 0000-0001-6792-9381
Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden.;Univ Rome Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome, Italy..
2020 (English)In: Journal of Physics G: Nuclear and Particle Physics, ISSN 0954-3899, E-ISSN 1361-6471, Vol. 47, no 5, article id 055001Article in journal (Refereed) Published
Abstract [en]

We present a reanalysis of the latest results from CMS dijet searches for an integrated luminosity of 36 fb(-1) together with preliminary results for 78 fb(-1) in the framework of simplified models for dark matter interacting with quarks through the exchange of a scalar, pseudoscalar, vector or pseudovector mediator particle. Within the same framework, we also project the sensitivity of dijet searches in future LHC runs and study how well the parameters of a simplified model could be reconstructed in case of a future discovery at the high luminosity (HL) LHC. Finally, we explore the possibility of discriminating different mediator scenarios by extending the sensitivity of dijet searches for simplified models through the use of angular information. It is the first time that these studies are performed systematically for the case of spin 0 mediators. Among other results we find:.(1) no evidence for a dijet signal in the simplified model framework;.(2) improvements due to an increased luminosity at the HL-LHC are significant, but mostly for heavy mediators, where dijet searches are limited by statistical, rather than systematical uncertainties;.(3).Information on the angular separation of dijets could be used at the HL-LHC to discriminate different mediator scenarios.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2020. Vol. 47, no 5, article id 055001
Keywords [en]
dark matter simplified models, collider searches, beyond the standard model
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-271916DOI: 10.1088/1361-6471/ab6949ISI: 000521458300001Scopus ID: 2-s2.0-85082469051OAI: oai:DiVA.org:kth-271916DiVA, id: diva2:1425546
Note

QC 20200421

Available from: 2020-04-21 Created: 2020-04-21 Last updated: 2020-04-21Bibliographically approved

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